Gun support bracket



FIG. 1 is a perspective view of a gun support bracket showing the claimed design;

FIG. 2 is top elevational view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is a front view thereof. 

CLAIM The ornamental design for a gun support bracket, as shown and described. 